<template>
  <div id="Login" class="login_container">
    <div class="login_box">
      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="~assets/logo.png">
      </div>     
      <!-- 登录表单区域 -->
      <el-form ref="loginFormRef" :model="loginForm" :rules="loginFormRules"  label-width="0px" class="login_form">
        <el-form-item prop="username" >
          <el-input v-model="loginForm.username" prefix-icon="el-icon-user" ></el-input>
        </el-form-item>
        <el-form-item  prop="password">
          <el-input v-model="loginForm.password" type="password" prefix-icon="el-icon-lock" ></el-input>
        </el-form-item>
        <el-form-item class="btns" >
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetLoginForm">重置</el-button>
        </el-form-item>       
      </el-form>
    </div>
  </div>
</template>

<script>
import { Login } from 'network/login'
import { usernameVf, passwordVf} from 'common/js/validator'
export default {
  name: "Login",
  data() {
    return {
      //登录表单数据绑定对象
      loginForm: {
        username: "admin",
        password: "123456"
      },
      //表单验证规则对象
      loginFormRules: {
        //验证用户名是否合法
        username: usernameVf,
        //验证密码是否合法
        password: passwordVf
      }
    }
  },
  methods: {
    //点击重置按钮，重置登录表单
    resetLoginForm() {
      this.$refs.loginFormRef.resetFields()
    },
    //登录校验函数
    login() {
      this.$refs.loginFormRef.validate(valid => {
        //验证表单是否合法
        if(!valid) return
        //发起网络请求
        Login(this.loginForm).then(res => {
          if(res.meta.status !== 200) {
            this.$message.error('登录失败')
            return
          }
          else {
            this.$message.success('登录成功')
            //1、保存token到sessionStorage中
            window.sessionStorage.setItem('token',res.data.token)
            //2、页面挑战
            this.$router.push('/home')
          }
        }).catch(err => {
          this.$message.error(err)
        })
      })
    }
  }
}
</script>

<style lang="less" scoped>
.login_container {
  background-color: #2b4b6b;
  height: 100%;
}
.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }
}
.login_form {
  position: absolute;
  bottom: 0;
  width: 100%;
  padding:  0 20px;
  box-sizing: border-box;
}
.btns {
  display: flex;
  justify-content: flex-end;
}
</style>
